Rising 634 meters above the densely packed capital, the tower’s sky kissing height makes it vulnerable to certain weather conditions. Its most common meteorological run-in is with the wind, and indeed this is why the tower was closed for business Monday. Strong winds can cause vibration and swaying of the elevators, one set of which rushes passengers up to the 350-meter deck in about 50 seconds.

But the snow is the main headache on the day after the storm, as the tower has its first major dealings with a wintry cold front since opening for business in May. To cope with the potential danger of falling white stuff, Tobu Tower Skytree Co., the operator of the tower, has mobilized its troops. It said it has dispatched about 60 security guards within a 200-meter radius of the structure to warn pedestrians of the possibility of giant snowballs falling from the sky. Another 50 workers have been tasked with observation duties around the tower.

The tower has about 45 security cameras located throughout the tower’s structure to monitor the snow. The company has also installed a heater on the outer wall of the viewing platform to melt away any ice as well as netting at certain intervals to catch any falling snow.

Monday’s snowfall cloaked Japan’s Kanto region, with over 40 centimeters (16 inches) piling up in some areas. The storm disrupted traffic, suspended train lines and caused hundreds of flights into Tokyo’s two major airports to be canceled. One person died and nearly 900 people have suffered snow-related injuries across the capital and six nearby prefectures, according to state broadcaster NHK as of Tuesday afternoon.

A Tobu Tower Skytree spokesman said there have been no reported injuries or building damage caused by falling snow from the tower so far. But said there were four reported incidents around the Sumida Ward last year where it’s likely that snow from the tower smashed through the roofs of buildings as far as 200 meters from the landmark.

The operator has emphasized the fortitude of the steel frame-enforced structure against the elements. The tower was undamaged during the March 2011 earthquake, which hit when it was still under construction, and is said to be able to withstand the force of an earthquake comparable with the 1923 Great Kanto Earthquake.

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Japan Real Time is a newsy, concise guide to what works, what doesn’t and why in the one-time poster child for Asian development, as it struggles to keep pace with faster-growing neighbors while competing with Europe for Michelin-rated restaurants. Drawing on the expertise of The Wall Street Journal and Dow Jones Newswires, the site provides an inside track on business, politics and lifestyle in Japan as it comes to terms with being overtaken by China as the world’s second-biggest economy. You can contact the editors at japanrealtime@wsj.com